US127940A - Improvement in school desks and seats - Google Patents

Description

1. UPHAM & w. H. KLI'NE. `Improvement in Schock-Desks and Seats.

N0. y127,@1-0. l Patented June 11,1872..

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UNITED STATES PATENT OEEIoE.

JOHN UPHAM AND WILLIAM H. KLINE, OFEATON, OHIO.

Specification forming part of Letters Patent No. 127,940, dated June 11, 1872.

Specification describing a certain Improvement in School Desks and Seats, invented by J oHN UPHAM and WILLIAM H. KLINE, of Eaton, in the county of Preble and State of Ohio.

The nature of this invention consists in providing an improved hinge for the swinging seat and folding leaf of the desk, which, among other peculiarities, possesses the ability of taking up lost motion in the joint caused by wear, so that it may always be sadjusted as to prevent the seat or leaf from turning too easily, as'will be more fully described hereinafter.

Figure l is an end view of our improved desk and seat. Fig. 2 is a vertical transverse section thereof. Fig. 3 is a vertical section, showing the hinge in detail. Fig. 4l is a perspective view of the adjustable portion of the hinge.

The same letters of reference are employed in all the gures in the designation of identical parts. A

A refers to the desk and book-receptacle, B to the seat, and O to the end frames or standards, all of which parts may be of any preferred con struction and conformation. The leaf A of the desk and the seat B are hinged to the end frames, so that they maybe turned up when not in use, and thus afford greater facility to the scholars for passing to and fro between the rows of desks. As these hinges arev substantially alike in construction it will suiice to describe only one of them, the one upon which the seat swings being selected for that purpose. Each end of the seat is provided with a cast-iron bar, D, which is constructed with a downwardly-projecting lug, D', opposite to atapering projection, O1, upon the interior side of the end frame C. A hole is formed in the lug D', countersunk upon each side, as best seen in Fig. 3, which is entered upon one side by the tapering projection O1, and upon the other side by a similarly tapering projection, E', on the bar E. These parts are so made that when first united together there will be some space left upon each side of the lug D,

between the frame C, upon one side, and between the bar E upon the other, so that as the eye in the lug and the tapering projections vturning in it wear away the slack thus occasioned may be taken up by drawing the parts closer together. The bar E has a V-shaped groove in one side, extending from its lower end to the hole e, through whichrpasses the bolt F, which .secures it to the frame O. The V'shaped groove is entered by a corresponding projection, C2, on the frame O, to steady thle bar and hold its upper end as rigid as possi le. Y

The slack in the joint is taken up by screwing up the nut on the bolt F, care being taken to adjust this so th at the friction in the joint will be just sufficient to prevent the seat or leaf from turning by its own weight. In this manner the noise in turning down will be so little as not to interrupt the exercises, and, sudden shocks being avoided, the wear and tear will also be greatly reduced.

Where the slats composing the seat and back are secured to the arms D projections may be cast upon the latter, separating the slats, and partly entering transverse grooves cut therein, so as to prevent the slats from moving in their seats upon such arms. In like manner may the upper slats of the back be secured to the end frames or standards G.

What we claim as our invention, and desire to secure by Letters Patent, is The arm D, having the projection D', in which a hole is formed, countersunk upon both sides, in combination with the tapering projection Cl on the frame C, and the adjustable bar E having a similar tapering projection, E', theparts being connected` together substantially as specified.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

JOHN UPHAM. WILLIAM H. KLINE. Witnesses:

I. N. WELsH, JN0. R. STEPHEN.

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